Swift 结合添加运算符方法，如何使返回值简单、简短，如 Publishers.FlatMap.XX> 到 AnyPublisher

当我添加一些运算符时，返回值会更长，例如：

Publishers.FlatMap ，令牌>，AnyPublisher >

其实我希望用户只需要知道AnyPublisher足够。

有什么办法让我只能返回AnyPublisher而不是Publishers.FlatMap ，令牌>，AnyPublisher >

public func singleHTTPLoginSignal(ccCode:String, phone: String, authType:String,password: String) ->  AnyPublisher<NetResponse<OauthToken>, Error>{
    return API.shared.combine_loadModelResource(GetOauthTokenAPI(ccCode: ccCode, phone: phone, authType: authType,password: password), type: OauthToken.self)

}

///Map:NetResponse<MQTTToken> -> Token
public func singleMQTTLoginSignal(oauthToken: OauthToken) ->
    Publishers.Map<AnyPublisher<NetResponse<MQTTToken>, Error>, Token>{
        
    API.shared.combine_loadModelResource(GetMQTTTokenAPI(accessToken: oauthToken.access_token), type: MQTTToken.self).map({ response in
        return Token(oauthToken: oauthToken, mqttToken: response.data!)
    })
}


///AnyPublisher<Token, Error>
public func loginFullSignal(ccCode:String, phone: String, authType:String,password: String) -> Publishers.FlatMap<Publishers.Map<AnyPublisher<NetResponse<MQTTToken>, Error>, Token>, AnyPublisher<NetResponse<OauthToken>, Error>>
{
    self.singleHTTPLoginSignal(ccCode:ccCode,phone:phone,authType:authType,password:password).flatMap{ response  in
        return self.singleMQTTLoginSignal(oauthToken: response.data!)
    }
}

我们正在为您的案例使用 .eraseToAnyPublisher() 。

苹果文档 https://developer.apple.com/documentation/combine/just/erasetoanypublisher()